RS485 and relay output not working

I purchased an Axon M205 a few weeks ago. The hardware/software stack looks promising, but I cannot make it work.

Serial issue

When I plugs in a xS40 extension on RS485 1.3, it is not detected (no led blinking). When I use RS485 1.1, leds start blinking. Furthermore, in evok control panel, there is only one serial, while I am expected three of them (1 RS232 and 2 RS485). On system, there is only /dev/extcomm/0/0.

When using RS485 1.1, no additional DI or RO appear in the control panel. Here is my configuration:

When using evok (or direct switch using appropriate DIY.X, or SysFS), I am able to get the RO led on. But it looks like that the contact is never made (I am not able to switch on any light - protected by a 2A circuit breaker). I don't know if the relay is supposed to do any "noise" on contact, but there is nothing.

I'll reply to both your questions. Apologies for taking a while, I have not been available over the Christmas period.

The upper board RS485/RS232 ports are accessible under /dev/ttyS(0-3) as opposed to /dev/extcomm/0/0. This is unfortunately a hardware limitation which we cannot work around easily.

If the LED light turns on then the relay should have continuity across it; the LEDs are controlled by the same circuitry as the output itself. If there is no change in continuity across the output it may be due to some sort of a hardware fault. I should note that digital (as opposed to relay) outputs are transistor-based, and will not make any noise. The relays should issue an audible click however. Could you please post a quick schema of your installation as well? LED lights in particular can have a very high inrush current, which a slow-blow fuse may not neccesarily catch.